Question:
The question figure shows the 3D view of an object. Identify the correct number of visible surfaces.
The question figure shows the 3D view of an object. Identify the correct number of visible surfaces.
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Count each separate flat face once, grouping them by the direction they face; coplanar parts count as one face.
Updated On: Nov 12, 2026
- 9
- 10
- 11
- 12
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The Correct Option is B
Solution and Explanation
Count the visible faces by orientation, taking coplanar parts as a single face.
Facing upward (4): the top of the tall block (with the slot opening), the floor seen inside the slot, the top of the lower step at the left and the top of the lower step at the front right.
Facing the lower left (3): the tall left face above the left step, the end wall seen inside the slot and the long front face of the base (including its small notch).
Facing the lower right (3): the large right face of the tall block, the side wall inside the slot and the front face of the lower right step.
Total = 4 + 3 + 3 = 10.
Answer: (2) 10
Facing upward (4): the top of the tall block (with the slot opening), the floor seen inside the slot, the top of the lower step at the left and the top of the lower step at the front right.
Facing the lower left (3): the tall left face above the left step, the end wall seen inside the slot and the long front face of the base (including its small notch).
Facing the lower right (3): the large right face of the tall block, the side wall inside the slot and the front face of the lower right step.
Total = 4 + 3 + 3 = 10.
Answer: (2) 10
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